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misc: add pca9552 LED blinker model

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Specs are available here :

    https://www.nxp.com/docs/en/application-note/AN264.pdf

This is a simple model supporting the basic registers for led and GPIO
mode. The device also supports two blinking rates but not the model
yet.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180530064049.27976-7-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Cédric Le Goater 2018-06-08 13:15:32 +01:00 • committed by Peter Maydell
parent 3d165f12db
commit 5141d4158c
9 changed files with 426 additions and 2 deletions
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32
include/hw/misc/pca9552.h Normal file
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/*
* PCA9552 I2C LED blinker
*
* Copyright (c) 2017-2018, IBM Corporation.
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#ifndef PCA9552_H
#define PCA9552_H
#include "hw/i2c/i2c.h"
#define TYPE_PCA9552 "pca9552"
#define PCA9552(obj) OBJECT_CHECK(PCA9552State, (obj), TYPE_PCA9552)
#define PCA9552_NR_REGS 10
typedef struct PCA9552State {
/*< private >*/
I2CSlave i2c;
/*< public >*/
uint8_t len;
uint8_t pointer;
uint8_t regs[PCA9552_NR_REGS];
uint8_t max_reg;
uint8_t nr_leds;
} PCA9552State;
#endif

32
include/hw/misc/pca9552_regs.h Normal file
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/*
* PCA9552 I2C LED blinker registers
*
* Copyright (c) 2017-2018, IBM Corporation.
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#ifndef PCA9552_REGS_H
#define PCA9552_REGS_H
/*
* Bits [0:3] are used to address a specific register.
*/
#define PCA9552_INPUT0 0 /* read only input register 0 */
#define PCA9552_INPUT1 1 /* read only input register 1 */
#define PCA9552_PSC0 2 /* read/write frequency prescaler 0 */
#define PCA9552_PWM0 3 /* read/write PWM register 0 */
#define PCA9552_PSC1 4 /* read/write frequency prescaler 1 */
#define PCA9552_PWM1 5 /* read/write PWM register 1 */
#define PCA9552_LS0 6 /* read/write LED0 to LED3 selector */
#define PCA9552_LS1 7 /* read/write LED4 to LED7 selector */
#define PCA9552_LS2 8 /* read/write LED8 to LED11 selector */
#define PCA9552_LS3 9 /* read/write LED12 to LED15 selector */
/*
* Bit [4] is used to activate the Auto-Increment option of the
* register address
*/
#define PCA9552_AUTOINC (1 << 4)
#endif